2025 02 Drainage Statement Signed

2025-01 HydroCAD NOAA 24-hr D 10-Year Rainfall=5.22" 2025-01 HydroCAD NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Dynamic Engineering Printed 2/21/2025 Prepared by Dynamic Engineering Printed 2/21/2025 HydroCAD® 10.20-6a sin 08640 © 2024 HydroCAD Software Solutions LLC Page 34 HydroCAD® 10.20-6a sin 08640 © 2024 HydroCAD Software Solutions LLC Page 35 Hydrograph for Subcatchment 4S: Proposed Pervious Summary for Link 5L: Existing Total Time Precip. Excess Runoff Time Precip. Excess Runoff Inflow Area 1.133 ac, 77.12% Impervious, Inflow Depth = 4.35" for 10-Year event (hours) (inches) (inches) (cis) | (hours) (inches) (inches) (cfs) inflow 5.16 cfs @ 12.10 hrs, Volume= 0.410 af 0.00 0.00 0.00 0.00 | 26.00 522 237 0.00 = = = 9.90.00 0.00 9.00 | 26000 822 237 0.00 Primary 5.16 cfs @ 12.10 hrs, Volume: 0.410 af, Atten= 0%, Lag= 0.0 min 1.00 0.08 0.00 0.00 | 27.00 522 237 0.00 = 7 = = ts0 00800 ooo | o780 6an 3 00 Primary outflow = Inflow, Time Span= 0.00-30.00 hrs, dt= 0.05 hrs 200 0.13 0.00 0.00 | 2800 522 237 0.00 . a 250 0.16 0.00 0.00 2850 5.22 237 0.00 Link 5L: Existing Total 3.00 020 0.00 0.00 | 2900 522 237 0.00 Hydrograph 350 0.23 0.00 000 | 2950 522 237 0.00 —_— 400 0.27 0.00 0.00 | 3000 622 2.37 0.00 Tt 450 0.31 0.00 0.00 500 0.36 0.00 0.00 550 0.40 0.00 0.00 600 045 0.00 0.00 650 049 0.00 0.00 7.00 055 0.00 0.00 750 061 0.00 0.00 800 068 0.00 0.00 850 0.75 0.00 0.00 z 900 083 0.00 0.00 £ 950 0.92 001 0.00 2 10.00 1.03 0.02 0.01 Fd 1050 1.17 0.04 0.01 11.00 136 0.08 0.03 1150 165 (0.16 0.07 1200 250 0.53 0.43 1250 357 1.16 0.18 13.00 3.86 1.36 0.10 13.50 4.05 1.50 0.07 1400 4.19159 0.05 ° sant 1450 430 1.67 0.05 OF 2a eS OT BOTT DT Me EW 18 10202 B26 25 26 27 28 20°30 15.00 4.39 1.74 0.04 Time (hours) 1550 4.47 1.80 0.03 16.00 4.54 1.85 0.03 1650 461 1.90 0.03 1700 487 1.95 0.03 1750 4.73 1.99 0.02 1800 4.77 2.03 0.02 1850 4.82 2.06 0.02 19.00 4.86 2.09 0.02 1950 4.91 2.13 0.02 20.00 495 216 0.02 2050 499 219 0.02 2100 502 222 0.02 2150 506 2.24 0.02 2200 509 227 0.02 2250 5.13 2.30 0.02 23.00 5.16 = 2.32 0.01 2350 519 235 0.01 2400 5.22 2.37 0.01 2450 522 237 0.00 2500 522 2.37 0.00 25.50 522 2.37 0.00